Atomic Number and Mass Number

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1st 20 elements

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20 Terms

1
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Hydrogen

Atomic No:1

Mass No:1

2
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Helium

Atomic No:2

Mass No:4

3
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Lithium

Atomic No:3

Mass No:7

4
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Beryllium

Atomic No:4

Mass No:9

5
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Boron

Atomic No:5

Mass No:11

6
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Carbon

Atomic No:6

Mass No:12

7
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Nitrogen

Atomic No:7

Mass No:14

8
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Oxygen

Atomic No:8

Mass No:16

9
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Flourine

Atomic No:9

Mass No:19

10
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Neon

Atomic No:10

Mass No:20

11
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Sodium

Atomic No:11

Mass No:23

12
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Magnesium

Atomic No:12

Mass No:24

13
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Aluminium

Atomic No:13

Mass No:27

14
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Silicon

Atomic No:14

Mass No:28

15
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Phosphorus

Atomic No:15

Mass No:31

16
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Sulphur

Atomic No:16

Mass No:32

17
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Clorine

Atomic No:17

Mass No:35

18
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Argon

Atomic No:18

Mass No:40

19
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Potassium

Atomic No:19

Mass No:39

20
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Calcium

Atomic No:20

Mass No:40